Module Effect

Effect

INTRODUCTION

The Effect module allows you to access all the data of particle
effects. An effect can modify a mesh object using particles, where
vertex of the mesh emits particles, which can themselves emit new
particles.

In the Blender internals, the effect object is just a placeholder
for the particle effect. Prior to v2.39 build and wave effects were
also supported by Blender, and the Python API supported all three types
of effects. They were removed in v2.39 when the build and wave
modifiers were implemented.